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В случае Auto-Precharge оно само регенерирует строку, к которой обращались.
Full-page - надо самому регенерировать.
А в общем случае вот:
AUTO REFRESH is used during normal operation of the SDRAM and is analogous to
CAS#-BEFORE-RAS# (CBR) refresh in conventional DRAMs. This command is nonpersistent,
so it must be issued each time a refresh is required. All active banks must be PRECHARGED
prior to issuing an AUTO REFRESH command. The AUTO REFRESH
command should not be issued until the minimum P has been met after the PRECHARGE
command as shown in the Operation section.
The addressing is generated by the internal refresh controller. This makes the address
bits “Don’t Care” during an AUTO REFRESH command. The 64Mb SDRAM requires
4,096 AUTO REFRESH cycles every 64ms (EF), regardless of width option. Providing a
distributed AUTO REFRESH command every 15.625µs will meet the refresh requirement
and ensure that each row is refreshed. Alternatively, 4,096 AUTO REFRESH commands
can be issued in a burst at the minimum cycle rate (C), once every 64ms.
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